How the heck does he find the numbers of those random people from NJ?! Unless Joeys friends from CT got the numbers that night, but that is not what the article makes it sound like. Someone knew somebody from beforehand, and we just do not know? I think there is some connection we do not know about between these unnamed friends. IMOO
I think, when Joey 'met' the girls/LD in the nightclub, he would have been introduced to them by mutual friends of some sort. That's the way most people link up, it's pretty unusual to hang out with a completely random group of strangers you bumped into at the bar (unless it's a hook up, maybe. Even then, most people are leery of complete unknowns)
Edited: or reading Mom's post, he 'met' them as in ran into people he hadn't seen in a while.